Caster



G. E. HILL.

(EASTER.

Patented May 24, 1887.

INVENTOR M WW.

WITNESSES;

UNITED STATES PATENT OFFICE.

G. EVERETT HILL, OF PHILADELPHIA, PENNSYLVANIA.

CASTER.

'IECL'PICATION forming part of Letters Patent No. 363,637, dated May 24, 1887.

Application filed December 6, 1886. Serial No. 220,756. (No model.)

To aZZ whom it may concern:

Be it known that l, G. EVERETT HILL, a citizen of the United States, residing in the city of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Casters, of which invention the following is a specification.

The object of this invention is to make the caster adjustable as to height, so that it can and applied to a furniture-leg, shown in sec-- tion; Fig. 2, a similar view showing a modification in the exterior form of the socket; Fig. 3, a vertical section on a middle line through Fig. 1. t

a represents a leg of any article of furniture;-

I), a metallic socket set in a recess in leg (4, and secured in position by means of a screw, 0, or other equivalent fastening. The socket b is provided with the internal screw-thread, d, which extends the whole depth of the socket.

e is the vertical spindle of the caster. f is a plug provided with the exterior screwthread, 9. corresponding with the screw thread (Z and with the flange g, which overlaps the socket b. The edge of this flange is milled, to facilitate adjustment by rotation. The spindle e is riveted at h, to attach it to the plug f. i is a set-screw. WVhen the legs of furniture to which these casters are applied are found to bear unevenly 011 the floor, the plug f is adjusted up or down by application of the thumb and finger to the milled edge of the flange g to counteract the unevenness, and the setscrew '5 then tightened to hold the adjustment.

There is a class of casters which are made adjustable by means of a screw-thread on the spindle. As this spindle is necessarily slender,any lateral strain caused by rolling or moving the furniture tends to break or bend the spindle,and thus destroy the usefulness of the caster. The diameter of plug f, which in my caster carries the screw-thread, is suflicient to afford all necessary strength, In another class of adjustable casters the weight of the furniture comes on a washer or a thin faceplate applied to the end of the furniture-leg. Owing to the thinness of such devices they can con tain but few -screw-threads,'alfording a less sccure bearing than the socket b and plug f of my caster.

It will be seen that my caster possesses a much greater capability of resistance to both lateral and vertical strains.

InFig. 2 the socket b is shown provided with a shoulder, b, the interior construct-ion being similar to that shown in Fig. 3. A socket of this form is better adapted in cases where the wood is soft or the leg small.

I clain1- In combination with the vertical spindle of a caster, the socket I), provided with secure means for attaching it to the furniture-leg and with an internal screwthread extending its entire depth, the plug f, provided with an external screw-thread extending its whole length in correspondence with that of the socket b, and provided further with a projecting flange having a milled edge, and the setscrew i, all for the purpose of making a durable caster ,vertically adjustable, substantially as set forth.

G. EVERETT HILL.

Witnesses:

J. E. SHAW, E. 0. BROWN. 

